问题描述：
I love PE,and I'm good _____baskball.A.at play B.for playing C.at to play D.for play
I love PE,and I'm good _____baskball.
A.at play B.for playing C.at to play D.for
写明为什么
A.at playing
I love PE,and I'm good _____baskball.
A.at play B.for playing C.at to play D.for
写明为什么
A.at playing
问题解答：
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